771713680 has 80 divisors (see below), whose sum is σ = 1844881920. Its totient is φ = 300064256.

The previous prime is 771713651. The next prime is 771713711. The reversal of 771713680 is 86317177.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 627306 + ... + 628534.

It is an arithmetic number, because the mean of its divisors is an integer number (23061024).

Almost surely, 2^771713680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 771713680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (922440960).

771713680 is an abundant number, since it is smaller than the sum of its proper divisors (1073168240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

771713680 is a wasteful number, since it uses less digits than its factorization.

771713680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1456 (or 1450 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 40.

The square root of 771713680 is about 27779.7350599317. The cubic root of 771713680 is about 917.2450984311.

The spelling of 771713680 in words is "seven hundred seventy-one million, seven hundred thirteen thousand, six hundred eighty".